Improvement in exhaust-pipes for steam-hammers



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EXHAUST-PIPE FOE STEAM-HAMMERS. No. 178,274

Patented June 6 1876.

fizveiz'i'ar:

UNITED STATES PATENT OFFICE.

JOHN B. ooLLIN, or ALTOONA, PENNSYLVANIA.

IMPROVEMENT IN'EXHA UST-PIPES F OR STEAM-HAMMERS.

Specification forming part of Letters Patent No. 178.274, dated June 6, 1876; application filed April 25, 1874.

To all whom it may concern:

Be it known that 1, JOHN B. COLLIN, of Altoona, in the county of Blair and State of Pennsylvania, have invented certain new and useful Improvements in Steam-Hammers, of which improvements the'tbllowingis a specification:

'As heretofore constructed and operated, the steam-hammer has been provided with anexhaust-pipe, into which the steam from the cylinder escaped, and by which it was conducted ofl' into the atmosphere above the roof of the building in which the hammer was worked. Such buildings are generally provided with high roots, to improve the ventilation, and the exhaust-pipe is consequently very long, sometimes i'orty feet in length. This long pipe was also of small diameter, and was simply attached to the side of the hammer-frame, so as to cover the eXhaust-openin g from the steamcylinder, being curved or provided with an elbow to bring it into an upright position.

With such a length of small pipe thus supported, the vibrations of the hammer-frame, with every blow of the hammer, make the pipe rock and tremble, and this rocking and trembling soon causes the pipe to leak, and this permits the escape of steam and hot water, which issue through the leaks, and scald the workmen, besides subjecting them to other inconveniences in managing the hammer and the metal being worked The intermissions of the exhaust establish an alternation of pufi's of steam up the pipe, and rushes of air down the pipe, with a constant resistance of the one current against the other, producing throughout the exhaustpipe a seesaw of steam and air, which occasions a considerable loss of power. Again, by reason of the great height or length of the exhaust-pipe there is so constant a back pressure upon the hammer-piston as to sensibly impair the force and efficiency of the blow given by the hammer, and this long small pipe being continuous, the steam condenses therein more rapidly than is desirable, so that less of it is discharged into the atmosphere than should be, and the condensed steam constant- 1y running down the continuous pipe accumulates at its lower end, and runs back into the cylinder through the exhaust-opening, so as to very rapidly destroy the packing of the pisof air, as above mentioned, thus saving the power heretofore lost, by relieving the hamlner-piston from back pressure, thus delivering the blow of the hammer more efiiciently, and by carrying oil the condensed steam, so that it shall not accumulate in the exhaustpipe and run back into the cylinder, thus preventing the wear of the packing of the pistonrod, and relieving the workman and the work from the leakages from thatsource.

To these ends my invention consists, as illustrated in the accompanying drawings, which form part of this specification, and in which Figure 1 is a vertical section, and Fig. 2 a plan,

in combining with the exhaust-opening of the steam-cylinder a short pipe, A, the lower end of which has a flange, E, by means of which this pipe is secured to the hammerframe around the exhaust-opening. The other end of this pipe A opens into the lower end of a pipe, D, which is supported independently of the hammer-frame, and which extends up through the root, but is not in any way attachedto the pipe A. The pipe D should have a "diameter four or five times that of the pipe A, so that there will be an annular openingat the lower end of the pipe D, around the free end of the pipe A, in which annular space the free end of the pipe A may vibrate or rock, and through which there 'may be a free access of air from the bottom to the top of pipe D. It should be understood explicitly that although the drawing shows the pipe D supported upon the base of the block which supports the pipe A, this is only vfor convenience;

of representation, and that 'in L snpperte er the pipe D have, an abnve eta-ten, no connection with the hammer-frame.

Belew the free end of the pipe A, and under the lower end 0f the pipe D, i arrange a receiver, B, and cemluit G for the condensed. sleem, which falls or trickles tlewn the pipe D inte the I'ECEiVBi", and is carried 05 by the eomlnit O to any peint Suitable forite dis charge,

connection or attachment of the pipe A to the hammermule shonhl be made pine iieelly eteem-tight, in any of the nsnei Weye.

With'this construction, will be seen only the small short nine A is SllhjQCElGiltO the jars efthe hammer-frame, and its yihrsttien is thus no modified that the eenneetien the pipe with the frame is not iikely to he Stlitilflfifi or to leak. The eiseonneetien at the exhaustpipe A from the pipe or ehimne l) relieves the piston entirely rem ea-cl: pressure, end the ehimney D, being supperted in'zlependentiy of the hammer-frame, is net afi'eeced. by the jarring of the hammer, as heretofore, Mereever, the open lewei' end nf the pipe or e'nim ney "D insnz'es a eenstent current 01- drenft of air thlfiu gil the ehimney,eceelemtee by the @SQZIPB e1" steam from the exhaust-pine into 1e chimney, and continuously ascending, inetezni at two currents seesawing, as nheve described, and by conducting the condensed steam clown the pipe D and intercepting it, so that it does not Tnnbnek into the exhaustpipe and into the cylinder, I prevent the wearing of the packing and the attendant leakage from this hoarse.

Having thnsdeseribed the nature and ohjeets 0i my invention, What I claim as new, and deeire to secure by Letters Patent, is-- 1. The enmbinittien with the exhaust of a steam-hammer, of a short exhaust-pipe and an independent chimney, the combination beingand operating substantially as and for the purposes described.

' 2, The combination of the exhaust-opening,

the-exizenstpine, the independent chimney,

anal the receiver, substantially e-s znnl fer the pntpeses described. Si. 13. GQLLIN,

Witnesses:

I. B. BOWMAN, W. G. S'rnAR-ns, 

